Domnall Mor Ua Briain

Domnall Mor Ua Briain (1137-1194), also known as Donall "the Great" O'Brian, was King of Tuadmuma from 1168 to 1194, succeeding Muirchertach mac Toirdelbhach Ua Briain and preceding Muirchertach Dall macDomnaill Mor.

Biography
Donall O'Brian was the son of King Toirdelbhach mac Diarmaida Ua Briain of Tuadmuma, and he ascendeded to the throne in 1168 after the death of his brother Muirchertach mac Toirdelbhach Ua Briain. In 1169, O'Brian was defeated by Ruaidri Ua Conchobair and was forced to pay him a tribute of 300 cows, and, in 1171, he was forced to submit to King Henry II of England at Caisil. However, he continued to fight against the Norman invasion of Ireland for several years; he defeated the Normans at the Battle of Thurles in 1175. In 1176, he drove the Normans from Limerick, and he conquered Limerick in 1178. In 1185, he defeated Prince John of England at the River Suir valley, and, in 1188, he scored another victory over the English in the Curlew Mountains. In 1193, the Normans retaliated by devastating Clare and plundering Osraige. Domnall died in 1194, the last King of Munster.